WO2005050674A1 - Materiau de fil supraconducteur, fil supraconducteur multiconducteur mettant en oeuvre celui-ci et procede de production associe - Google Patents

Materiau de fil supraconducteur, fil supraconducteur multiconducteur mettant en oeuvre celui-ci et procede de production associe Download PDF

Info

Publication number
WO2005050674A1
WO2005050674A1 PCT/JP2004/015905 JP2004015905W WO2005050674A1 WO 2005050674 A1 WO2005050674 A1 WO 2005050674A1 JP 2004015905 W JP2004015905 W JP 2004015905W WO 2005050674 A1 WO2005050674 A1 WO 2005050674A1
Authority
WO
WIPO (PCT)
Prior art keywords
superconducting
wire
metal
oxide superconductor
superconducting wire
Prior art date
Application number
PCT/JP2004/015905
Other languages
English (en)
Japanese (ja)
Inventor
Munetsugu Ueyama
Jun Fujikami
Original Assignee
Sumitomo Electric Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries, Ltd. filed Critical Sumitomo Electric Industries, Ltd.
Priority to EP04793017A priority Critical patent/EP1686594A4/fr
Priority to JP2005515568A priority patent/JPWO2005050674A1/ja
Priority to CA002522049A priority patent/CA2522049A1/fr
Publication of WO2005050674A1 publication Critical patent/WO2005050674A1/fr
Priority to US10/553,171 priority patent/US20070184984A2/en
Priority to NO20062882A priority patent/NO20062882L/no
Priority to HK06109809.6A priority patent/HK1089549A1/xx

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/20—Permanent superconducting devices
    • H10N60/203—Permanent superconducting devices comprising high-Tc ceramic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N60/00—Superconducting devices
    • H10N60/01—Manufacture or treatment
    • H10N60/0268—Manufacture or treatment of devices comprising copper oxide
    • H10N60/0801—Processes peculiar to the manufacture or treatment of filaments or composite wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Definitions

  • the present invention relates to a superconducting wire, a superconducting multi-core wire using the same, and a method for producing them
  • the present invention relates to a superconducting wire. More specifically, the present invention relates to a superconducting wire comprising an oxide superconductor and a metal to be covered. Further, the present invention relates to a superconducting multi-core wire including a plurality of the above-described superconducting wires and a second covering metal.
  • the present invention relates to a method for producing the above-described superconducting wire. Further, the present invention relates to a method for producing the above-described superconducting multi-core wire.
  • bismuth-based multifilamentary wires have been developed as oxide high-temperature superconducting wires.
  • Bismuth-based multifilamentary wires are manufactured by the powder-in-tube method using (BiPb) Sr Ca
  • a raw material powder of a superconducting phase is first filled in a metal pipe.
  • the metal pipe is drawn to form a clad wire.
  • Multiple clad wires are bundled, reinserted into a metal pipe, and drawn to form a multi-core wire.
  • the multifilamentary wire is drawn into a tape wire having a large number of superconducting filaments in a metal sheath.
  • a primary heat treatment is further performed on the tape wire to generate a target superconducting phase.
  • the tape wire is rolled again and subjected to a second heat treatment to join the superconducting phase crystal grains.
  • these two rounds of heat treatment and heat treatment are performed once and not performed.
  • bismuth-based oxide superconductors including the Bi-2223 phase tend to be brittle and have poor flexibility because they are ceramics, and therefore are generally covered with a metal sheath. is there.
  • the type of metal used for the metal sheath adversely affects the superconducting performance of the bismuth-based oxide superconductor. From that point of view, it is known that the above-mentioned metal sheath does not affect the superconducting performance of the bismuth-based oxidized superconductor, and silver is used in many cases.
  • a step of filling a raw material powder of the superconducting phase into a metal pipe and subjecting the metal pipe to at least one plastic kneading and heat treatment to obtain a wire is performed at a temperature lower than the heat treatment temperature and at a temperature lower than the atmospheric pressure.
  • a method for producing a superconducting wire including a low-oxygen heat treatment step of heating the wire in a low-oxygen atmosphere see Patent Document 1.
  • a step of filling the raw material powder of the superconducting phase into a metal pipe a step of drawing this metal pipe to form a clad wire, and a step of bundling a plurality of clad wires to form a polygon inside the metal pipe again.
  • a method for producing a superconducting multifilamentary wire which is a method of rolling a multifilamentary wire when the rolling direction is the diagonal direction or the opposite side direction of the clad wire arranged in a polygonal shape, is disclosed! Reference 2).
  • Patent Document 1 JP 2003-203532
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2003-242847
  • an object of the present invention is to provide a superconducting wire having a high critical current density due to a large occupancy of an oxide superconductor and a low tendency to cause vertical cracks and disconnections in a manufacturing process. is there.
  • Another object of the present invention is to provide a superconducting multi-core wire having a high critical current density due to a large occupancy of an oxide superconductor and a low tendency to cause vertical cracks and disconnections in a manufacturing process. It is to provide.
  • another object of the present invention is to provide a superconducting wire capable of producing a superconducting wire having an excellent occupation ratio of an oxide superconductor and having an excellent critical current density without causing vertical cracks and disconnection. Is to provide a manufacturing method.
  • Another object of the present invention is to produce a superconducting multifilamentary wire having an excellent critical current density due to a large occupancy of an oxide superconductor without causing vertical cracks and disconnections. It is an object of the present invention to provide a method for manufacturing a superconducting multi-core wire.
  • the inventor of the present invention should consider the mechanical properties of coated metal such as silver pipe, which has been the focus of attention in the past! Based on the idea of, superconducting wires and superconducting multi-core wires having various materials and structures were prototyped, and superconducting multi-wires and superconducting multi-core wires with a large occupation ratio of oxide superconductor and excellent critical current density were developed. The materials and conditions of the coated metal that can be manufactured without causing vertical cracks and disconnections were studied.
  • the present inventor has found that the cause of the above-described vertical cracks and disconnections is that when the occupation ratio of the oxide superconductor increases, the superconducting wire and the structural material of the superconducting multi-core wire substantially become. It has been found that there is a problem that the structural material cannot withstand the stress or strain in the processing because the ratio of the material of the coated metal used is low.
  • the present inventor adjusted the strain rate at break in the stress-strain property test of the material of the coated metal to a specific range, so that the occupation rate of the oxide superconductor was large, so that the critical current density was low.
  • the present inventors have found that excellent superconducting multifilaments and superconducting multifilamentary wires can be manufactured without causing vertical cracks and disconnections, and overcome the above-mentioned problems to achieve the present invention.
  • the present invention relates to an oxidized superconducting wire comprising an oxide superconductor and a coating metal covering the oxide superconductor, wherein a stress-strain characteristic test of the material of the coated metal is performed. Is a superconducting wire having a strain rate at break of 30% or more.
  • the strain rate at break is in the range of 30% to 58%.
  • the strain rate at break is more preferably in the range of 45% to 58%.
  • the occupancy of the oxide superconductor is preferably in the range of 25% to 70%.
  • the maximum point stress in the stress-strain characteristic test of the material of the coated metal is preferably 180 MPa or more.
  • the material of the coating metal contains silver and Z or a silver alloy.
  • the material of the oxide superconductor preferably contains a bismuth-based oxide superconductor.
  • the material of the coating metal is preferably silver having an impurity concentration of 10 ppm to 500 ppm.
  • the impurity concentration is also a barometer for the occurrence of work cracks, and by controlling the impurity concentration of the coated metal, the frequency of occurrence of work cracks can be further reduced.
  • the superconducting multifilamentary wire of the present invention is a superconducting multifilamentary wire comprising a plurality of the above-described superconducting wires and a second coated metal covering the superconducting wires.
  • the superconducting multifilamentary wire preferably has a tape-like shape.
  • a raw material powder containing a material to be a material of an oxide superconductor is prepared by setting a strain rate at break in a stress-strain characteristic test within a range of 30% to 58%.
  • a method for producing a superconducting wire comprising: a step of filling a metal cylinder made of a coated metal material; and a step of performing one or more plastic workings and heat treatments on the metal cylinder filled with the raw material powder. .
  • silver having an impurity concentration of lOppm to 500ppm is preferable.
  • the raw material powder containing the material to be used as the material of the oxide superconductor is obtained by setting the strain at break point in the stress-strain characteristic test within the range of 30% to 58%.
  • a step of filling a metal cylinder made of a coated metal material a step of performing one or more times of plastic kneading on the metal cylinder filled with the raw material powder to obtain a wire, Filling a metal cylinder to be a coated metal material, and performing one or more times of plastic working and heat treatment on the metal cylinder filled with the plurality of wires to obtain a superconducting multifilamentary wire.
  • the material of the coated metal is preferably silver with an impurity concentration of lOppm-500ppm.
  • the superconducting wire of the present invention has a high critical current density due to a large occupancy of the oxide superconductor, and has a specified strain rate at break in a stress-strain property test of a coated metal material. Therefore, it is a superconducting wire having a low tendency to generate vertical cracks and disconnections in the manufacturing process, and having excellent critical current density and workability.
  • the superconducting multifilamentary wire of the present invention has a high critical current density due to the large occupancy of the oxide superconductor, and has a specific strain rate at break in the stress-strain characteristic test of the material of the coated metal.
  • the superconducting multifilamentary wire which has a low tendency to cause vertical cracks and breaks in the manufacturing process, has excellent critical current density and excellent workability.
  • the method for producing a superconducting wire of the present invention is capable of producing a superconducting wire having an excellent critical current density due to a large occupancy of an oxide superconductor without causing longitudinal cracks and disconnections. This is a method for manufacturing a wire.
  • the method for producing a superconducting multifilamentary wire of the present invention is to produce a superconducting multifilamentary wire having an excellent occupancy rate of oxide superconductor and a high critical current density without causing longitudinal cracks and disconnections. This is a method for producing a superconducting multi-core wire.
  • FIG. 1 is a flowchart showing an example of a method for manufacturing a superconducting wire according to the present invention.
  • FIG. 2 is a flowchart showing an example of a method for manufacturing a superconducting multi-core wire according to the present invention.
  • -It is a photograph figure which shows a mode of a distortion characteristic test.
  • a superconducting wire refers to a wire having a superconducting phase and a covering material that covers the superconducting phase.
  • this superconducting phase may or may not be included in one superconducting wire, but a plurality of superconducting phases may be included in one superconducting wire.
  • a superconducting multi-core wire means a wire having a plurality of superconducting phases and a covering material covering the superconducting phases.
  • the coating material may be a single layer, or may be a multilayer.
  • a superconducting multifilamentary wire means a broader concept including a superconducting multifilamentary wire. Therefore, according to the above definition, a superconducting multifilamentary wire may include a plurality of superconducting wires, but even in this case, it is assumed that this superconducting multifilamentary wire is a superconducting wire. .
  • a method for manufacturing a superconducting wire includes a step of adjusting a raw material powder of an oxide superconductor, a step of filling a raw material powder into a metal pipe, and a plastic working of the metal pipe filled with the raw material powder. It is preferable to include a step and a step of heat-treating the metal pipe filled with the plastically processed raw material powder.
  • the step of performing the plastic working includes a step of manufacturing a clad wire and a step of manufacturing a clad wire. It is preferable to include a step of manufacturing a core wire and a step of manufacturing a tape wire by rolling a multi-core wire. Further, the step of performing the plastic working and the step of performing the heat treatment may be performed twice or more each.
  • the method for producing a superconducting wire is a method for producing a bismuth-based multifilamentary wire, (BiPb) Sr Ca Cu O phase (Bi-2223 phase) by powder-in-tube method
  • a raw material powder of a superconducting phase is filled in a metal pipe.
  • the metal pipe is drawn into a clad wire.
  • Multiple clad wires are bundled, reinserted into a metal pipe, and drawn to form a multi-core wire.
  • the multifilamentary wire is rolled to form a tape wire having a large number of superconducting filaments in a metal sheet.
  • a primary heat treatment is further performed on the tape wire to generate a target superconducting phase.
  • the tape wire is rolled again and subjected to a second heat treatment to join the superconducting phase crystal grains. In some cases, these two rounds of heat treatment and heat treatment are performed once and not performed.
  • FIG. 1 is a flowchart showing an example of the method for producing a superconducting wire of the present invention.
  • the same manufacturing method as the above-described method for manufacturing a normal superconducting wire can be used, but as shown in FIG.
  • a raw material powder containing a material to be a material of the material into a metal cylinder to be a material of a coated metal including a material having a strain rate at break in a stress-strain characteristic test within a specific range (S101); It is particularly preferable to use a method for producing a superconducting wire, comprising a step (S103) of subjecting the metal cylinder filled with the raw material powder to at least one plastic working and heat treatment (S103).
  • FIG. 2 is a flowchart showing an example of the method for producing a superconducting multi-core wire according to the present invention. Also, in the method for manufacturing a superconducting multi-core wire of the present invention, the same manufacturing method as the above-described method for manufacturing a normal superconducting multi-core wire can be used, but as shown in FIG.
  • the raw material powder for the oxide superconductor used in the present invention a raw material powder blended so as to obtain a superconducting phase capable of finally having a critical temperature of 77 K or more is suitable.
  • the raw material powder includes not only a powder obtained by mixing the composite oxide to have a predetermined composition ratio, but also a powder obtained by sintering the mixed powder and pulverizing the sintered powder.
  • a bismuth-based material for example, Bi2
  • the starting raw material powder is Bi 2 O 3
  • a mixed raw material powder including PbO, SrCO, CaCO, CuO powder
  • Bi is preferably around 1.8
  • Pb is around 0.3-0.4
  • Sr is around 2
  • Ca is around 2.2
  • Cu is around 3.0.
  • the raw material powder to be filled in the metal cylinder used in the present invention preferably has a maximum particle size of 2.0 m or less, and an average particle size of 1.0 / zm or less. This is because the use of such a fine powder facilitates the generation of a high-temperature oxide superconductor.
  • the material of the metal tube (metal pipe) used in the present invention is selected from the group consisting of Ag, Cu, Fe, Ni, Cr, Ti, Mo, W, Pt, Pd, Rh, Ir, Ru, and Os. It is preferred to use more than one metal and Z or alloys based on these metals. Among them, it is particularly preferable to use silver, Z or a silver alloy in view of reactivity with the oxide superconductor and workability.
  • a material having sufficiently large strain at break can be used, such as rolling. Vertical cracks and disconnections that occur during the processing of the above can be suppressed.
  • a large strain at break means that the material elongates well, and a material with a high elongation has a high deformability, so it is considered that it is difficult to cause a vertical crack or a disconnection.
  • the strain rate at break in the stress-strain characteristic test of the material of the metal cylinder used in the present invention is preferably 30% or more, more preferably 45% or more. Further, the strain rate at break is preferably 58% or less in silver or silver alloy.
  • the strain rate at break is, the better, but on the other hand, since the maximum stress value tends to be low, the workability and the performance of the superconductor are both satisfied. This is because it is preferable that When the material of the metal cylinder is silver, Z or a silver alloy, the strain rate at break when the following maximum stress is 180 MPa is about 58%. It is desirable to do.
  • the higher the maximum stress in the stress-strain characteristic test which is not limited to the strain at the breaking point, the more effective the superconducting oxide and the uniform the internal cross-sectional shape of the superconductor.
  • the higher the maximum point stress (especially 0.2% resistance) of the cladding the greater the force applied to the oxide superconductor during subsequent processing, including the cladding. This is because the maximum force applied to the oxide superconductor during processing is determined by the maximum stress of the coated metal material. And it is considered that the greater the applied force, the more advantageous in this respect.
  • the maximum point stress in the stress-strain characteristic test of the material of the metal cylinder used in the present invention is preferably 180 MPa or more, and the higher the maximum point stress (maximum stress value), the higher the superconducting wire and the superconducting wire. Since the force applied to the oxide superconductor during the processing of the multifilamentary wire can be increased, and the oxide superconductor can be densified and the internal cross-sectional shape can be made uniform, the maximum point stress is 180 MPa or more. Preferably, there is.
  • the maximum point stress of a metal cylinder made of silver, Z or a silver alloy is about 180 MPa, and good superconducting wires and superconducting multi-core wires can be obtained by using a metal cylinder with a maximum point stress of 180 MPa or more. Power.
  • the use of a material having the above characteristics as the material of the metal cylinder used in the present invention is more effective when the occupation ratio of the oxide superconductor in the superconducting wire and the superconducting multi-core wire is 30% or more. It is.
  • the plastic working in the method for producing a superconducting wire and a superconducting multifilamentary wire of the present invention includes various surface reducing forces. Specific examples include wire drawing, rolling, pressing force, and stage.
  • the method of manufacturing a superconducting multifilamentary wire when the plastic working is performed only once, and when not performed, the specific contents of the plastic working are a metal cylinder filled with the raw material powder, and the metal cylinder is reduced in surface area.
  • the method includes forming a clad wire, manufacturing a multi-core wire by reducing the surface area of a metal tube in which the clad wire is bundled and inserted, and processing the multi-core wire into a tape shape.
  • the reason why the multifilamentary wire is processed into a tape shape is to make the crystal orientation of the superconducting multifilamentary wire finally formed uniform.
  • an oxide-based superconducting multifilamentary wire has a large difference in the current density that can flow depending on the direction of the crystal, and a higher current density can be obtained by aligning the crystal directions.
  • the heat treatment is performed twice or more, typically a primary heat treatment and a secondary heat treatment.
  • the primary heat treatment is performed mainly for the purpose of generating an oxide superconductor such as a Bi2223 phase.
  • the secondary heat treatment mainly binds the crystal grains of the oxide superconductor such as Bi2223 firmly. Perform to match.
  • the treatment temperature during the heat treatment is preferably 815 ° C or more for both the primary heat treatment and the secondary heat treatment, especially 830 ° C or more. Is more preferable. Further, the treatment temperature is preferably 860 ° C or lower, and more preferably 850 ° C or lower.
  • the primary heat treatment be in the range of 840 ° C to 850 ° C and the secondary heat treatment be in the range of 830 ° C to 840 ° C.
  • the secondary heat treatment may be performed at different temperatures within the above temperature range and in multiple stages (especially two stages).
  • the treatment temperature during the heat treatment is preferably 50 hours or more for both the first heat treatment and the second heat treatment. Further, the processing temperature is preferably 250 hours or less. Among the above treatment times, it is particularly preferable to set the treatment time of the secondary heat treatment to 100 hours or more.
  • the atmosphere during the heat treatment can be performed in the air atmosphere for both the first heat treatment and the second heat treatment.
  • the superconducting wire of the present invention is an oxidized superconducting wire comprising an oxide superconductor and a coated metal covering the oxide superconductor, wherein the coated metal is broken in a stress-strain characteristic test.
  • the above-mentioned strain rate at break is preferably 30% or more, more preferably 45% or more. Further, the strain rate at break is preferably 58% or less. This is based on the same reason as described above for the method of manufacturing a superconducting wire of the present invention.
  • the maximum point stress in the stress-strain characteristic test of the material of the coated metal used in the present invention is preferably 180 MPa or more. This is based on the same reason as described above for the method of manufacturing a superconducting wire of the present invention.
  • the use of a material having the above properties as the coating metal used in the present invention It is more effective when the occupation ratio of the oxide superconductor in the superconducting wire of the present invention is 30% or more. More specifically, it is preferable that the occupation ratio of the oxide superconductor in the superconducting wire and the superconducting multi-core wire in which a material having the above-mentioned properties is preferably used is 30% or more. This is based on the same reason as described above for the method of manufacturing a superconducting wire of the present invention.
  • the material of the coated metal used in the present invention is selected from the group consisting of Ag, Cu, Fe, Ni, Cr, Ti, Mo, W, Pt, Pd, Rh, Ir, Ru, and Os. It is preferred to use more than one metal and Z or alloys based on these metals. Among them, it is particularly preferable to use silver, Z or a silver alloy in view of reactivity with the oxide superconductor and workability. This is based on the same reason as described above for the method of manufacturing a superconducting wire of the present invention.
  • the material of the oxide superconductor used in the present invention preferably contains a bismuth-based oxide superconductor.
  • a powder obtained from a mixed raw material powder including powders of BiO, PbO, SrCO, CaCO, and CuO is used.
  • a bismuth-based oxide superconductor If manufactured by an appropriate manufacturing method such as the manufacturing method of the superconducting wire of the present invention, a superconducting phase which can have a critical temperature of 77K or higher is finally obtained.
  • the superconducting multifilamentary wire of the present invention is a superconducting multifilamentary wire comprising a plurality of the above superconducting wires and a second coated metal covering the superconducting wires.
  • the superconducting multifilamentary wire of the present invention preferably has a tape-like shape. This is based on the same reason as described above for the method of manufacturing a superconducting multifilamentary wire of the present invention.
  • the properties of the coated metal and the oxide superconductor used for the superconducting multifilamentary wire of the present invention are preferably the same as those of the above-described coated metal and oxide superconductor used for the superconducting wire of the present invention. This is based on the same reason as described above for the superconducting wire of the present invention.
  • the mixture was mixed at a ratio of 0. Next, the mixed powder was heat-treated in the air at 700 ° C for 8 hours, 800 ° C for 10 hours, and 840 ° C for 8 hours. After each heat treatment, grinding was performed.
  • This raw material powder was inserted into a silver pipe having an outer diameter of 36mm, an inner diameter of 33.5mm, a length of 1000mm, an oxygen content of 50ppm, a carbon content of 20ppm, and a silver purity of 4N, and was drawn to a diameter of 3.7mm.
  • a clad wire was produced.
  • 55 clad wires are bundled and arranged in a hexagonal shape, inserted into a silver alloy pipe with an outer diameter of 36 mm, an inner diameter of 28 mm, and a length of 1000 mm, and drawn to a diameter of 1.6 mm to obtain a multi-core wire.
  • this multifilamentary wire was rolled (primary rolling) and processed into a tape-shaped multifilamentary wire.
  • the obtained tape-shaped multifilamentary wire was subjected to primary heat treatment at 840 ° C to 850 ° C for 50 hours in an air atmosphere.
  • the tape-shaped multifilamentary wire after the primary heat treatment was re-rolled (secondarily rolled) so as to have a width of 4. Omm and a thickness of 0.2 mm.
  • the tape-shaped multifilamentary wire after re-rolling was subjected to a secondary heat treatment at 840 ° C to 850 ° C for 50 hours and 150 hours in an air atmosphere to obtain a superconducting multifilamentary wire.
  • the number of wire drawing cracks generated during the manufacturing process of the obtained superconducting multicore wire was visually confirmed. Table 1 shows the results of the number of wire drawing cracks.
  • Example 2-5 and Comparative Example 1-5 the occupation ratio of the oxide superconductor was set to the ratio shown in Table 1 above by using a coated metal having the characteristics shown in Table 1 above.
  • a superconducting multifilamentary wire was obtained in the same manner as in Example 1 except for.
  • Example 115 and Comparative Example 115 The stress-strain characteristic test of silver and Z or silver alloy pipes used in Example 115 and Comparative Example 115 was performed using a tensile tester at a test speed of 3 mmZmin and a distance between grips of 110 mm. Under the conditions, the strain rate at break (%) and the maximum point stress (MPa) were determined for each silver and Z or silver alloy pipe. Table 1 shows the measurement results of the strain rate at break (%) and the maximum point stress (MPa).
  • FIG. 3 is a photographic diagram showing a stress-strain characteristic test of silver and Z or a silver alloy pipe used in Examples and Comparative Examples of the present invention.
  • the superconducting multifilamentary wires of Examples 1 to 5 have a high strain rate at the breaking point of the coated metal material, and thus are unlikely to cause wire drawing cracks during the manufacturing process. It was found that the superconducting multifilamentary wire was superior to the superconducting multifilamentary wire.
  • Example 1 a silver pipe having a silver purity of 4N (99.99%) was used.
  • the impurity concentration of silver pipe with a silver purity of 4N is equivalent to 100 ppm.
  • the impurity concentrations were 5 ppm (Example 6), 10 ppm (Example 7), 50 ppm (Example 8), 500 ppm (Example A superconducting multi-core wire was manufactured in the same manner as in Example 1 except that a silver pipe of Example 9) and 100 ppm (Example 10) was used.
  • the impurities were Al, Fe, Cu, Ni, Si and Zn.
  • the impurity concentration is also a parameter of the occurrence of machining cracks. It was found that the frequency of occurrence can be reduced, and that the coated metal is preferably silver having an impurity concentration of 10 ppm to 500 ppm.

Abstract

L'invention concerne un matériau de fil supraconducteur en oxyde comprenant un article supraconducteur en oxyde et un métal de revêtement couvrant ledit article et caractérisé en ce que le matériau du métal de revêtement présente un pourcentage de déformation à la rupture d'au moins 30 % dans un test de caractéristiques de contrainte-déformation. Le matériau de fil supraconducteur présente une densité de courant critique élevée et est moins sujet à une séparation verticale ou à une rupture au cours du procédé de production de celui-ci.
PCT/JP2004/015905 2003-11-21 2004-10-27 Materiau de fil supraconducteur, fil supraconducteur multiconducteur mettant en oeuvre celui-ci et procede de production associe WO2005050674A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP04793017A EP1686594A4 (fr) 2003-11-21 2004-10-27 Materiau de fil supraconducteur, fil supraconducteur multiconducteur mettant en oeuvre celui-ci et procede de production associe
JP2005515568A JPWO2005050674A1 (ja) 2003-11-21 2004-10-27 超電導線材、それを用いる超電導多芯線およびそれらの製造方法
CA002522049A CA2522049A1 (fr) 2003-11-21 2004-10-27 Materiau de fil supraconducteur, fil supraconducteur multiconducteur mettant en oeuvre celui-ci et procede de production associe
US10/553,171 US20070184984A2 (en) 2003-11-21 2005-10-17 Superconducting wire, superconducting mutifilamentary wire using the superconducting wire, and method of manufacturing the same
NO20062882A NO20062882L (no) 2003-11-21 2006-06-20 Superledende elektrisk ledning, saerlig flerleder
HK06109809.6A HK1089549A1 (en) 2003-11-21 2006-09-04 Superconductive wire material, superconductive multi-conductor wire using the same and method for producing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-392406 2003-11-21
JP2003392406 2003-11-21

Publications (1)

Publication Number Publication Date
WO2005050674A1 true WO2005050674A1 (fr) 2005-06-02

Family

ID=34616447

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2004/015905 WO2005050674A1 (fr) 2003-11-21 2004-10-27 Materiau de fil supraconducteur, fil supraconducteur multiconducteur mettant en oeuvre celui-ci et procede de production associe

Country Status (10)

Country Link
US (1) US20070184984A2 (fr)
EP (1) EP1686594A4 (fr)
JP (1) JPWO2005050674A1 (fr)
KR (1) KR20060103509A (fr)
CN (1) CN100477019C (fr)
CA (1) CA2522049A1 (fr)
HK (1) HK1089549A1 (fr)
NO (1) NO20062882L (fr)
RU (1) RU2324246C2 (fr)
WO (1) WO2005050674A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2516291C1 (ru) * 2012-09-17 2014-05-20 Открытое акционерное общество "Энергетический институт им. Г.М. Кржижановского" ОАО "ЭНИН" Сверхпроводящий многожильный ленточный провод для переменных и постоянных токов

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6452337A (en) * 1987-08-21 1989-02-28 Mitsubishi Cable Ind Ltd Manufacture of superconductive wire
JPH08171822A (ja) * 1994-10-17 1996-07-02 Sumitomo Electric Ind Ltd 酸化物超電導線材およびその製造方法
JPH09115354A (ja) * 1995-10-20 1997-05-02 Hitachi Cable Ltd 酸化物超電導複合材及びその製造方法
JPH11111081A (ja) * 1997-09-30 1999-04-23 Kobe Steel Ltd 酸化物超電導線材
JP2000036221A (ja) * 1998-05-12 2000-02-02 Chubu Electric Power Co Inc 酸化物超電導圧縮成型導体およびその製造方法
JP2000222956A (ja) * 1999-02-03 2000-08-11 Sumitomo Electric Ind Ltd 酸化物多芯超電導線材の製造方法
JP2002528848A (ja) * 1998-02-10 2002-09-03 アメリカン スーパーコンダクター コーポレイション 高いシース抵抗率を有する超電導複合体

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4411959A (en) * 1981-08-17 1983-10-25 Westinghouse Electric Corp. Submicron-particle ductile superconductor
JP3253440B2 (ja) * 1993-12-28 2002-02-04 住友電気工業株式会社 酸化物超電導線材およびコイル
EP0756336A1 (fr) * 1995-07-28 1997-01-29 American Superconductor Corporation Déformation cryogénique d'une structure composite supraconductrice à haute température
US6469253B1 (en) * 1995-10-17 2002-10-22 Sumitomo Electric Industries, Ltd Oxide superconducting wire with stabilizing metal have none noble component
US6294738B1 (en) * 1997-03-31 2001-09-25 American Superconductor Corporation Silver and silver alloy articles
US6370405B1 (en) * 1997-07-29 2002-04-09 American Superconductor Corporation Fine uniform filament superconductors
GB9805641D0 (en) * 1998-03-18 1998-05-13 Metal Manufactures Ltd Superconducting tapes
US6448501B1 (en) * 1998-03-30 2002-09-10 Mcintyre Peter M. Armored spring-core superconducting cable and method of construction
DE19933954A1 (de) * 1998-08-03 2000-02-10 Siemens Ag Verfahren zur Herstellung eines bandförmigen Multifilamentsupraleiters mit Bi-Cuprat-Leiterfilamenten sowie entsprechend hergestellter Supraleiter
JP4622020B2 (ja) * 1999-02-26 2011-02-02 住友電気工業株式会社 絶縁被膜を有する酸化物超電導線材およびその製造方法
US6339047B1 (en) * 2000-01-20 2002-01-15 American Semiconductor Corp. Composites having high wettability
JP4016601B2 (ja) * 2000-07-14 2007-12-05 住友電気工業株式会社 酸化物超電導線材の製造方法とその製造方法に用いられる加圧熱処理装置
WO2002035614A2 (fr) * 2000-09-15 2002-05-02 American Superconductor Corporation Filaments pour composites d'oxyde supraconducteur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6452337A (en) * 1987-08-21 1989-02-28 Mitsubishi Cable Ind Ltd Manufacture of superconductive wire
JPH08171822A (ja) * 1994-10-17 1996-07-02 Sumitomo Electric Ind Ltd 酸化物超電導線材およびその製造方法
JPH09115354A (ja) * 1995-10-20 1997-05-02 Hitachi Cable Ltd 酸化物超電導複合材及びその製造方法
JPH11111081A (ja) * 1997-09-30 1999-04-23 Kobe Steel Ltd 酸化物超電導線材
JP2002528848A (ja) * 1998-02-10 2002-09-03 アメリカン スーパーコンダクター コーポレイション 高いシース抵抗率を有する超電導複合体
JP2000036221A (ja) * 1998-05-12 2000-02-02 Chubu Electric Power Co Inc 酸化物超電導圧縮成型導体およびその製造方法
JP2000222956A (ja) * 1999-02-03 2000-08-11 Sumitomo Electric Ind Ltd 酸化物多芯超電導線材の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1686594A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2516291C1 (ru) * 2012-09-17 2014-05-20 Открытое акционерное общество "Энергетический институт им. Г.М. Кржижановского" ОАО "ЭНИН" Сверхпроводящий многожильный ленточный провод для переменных и постоянных токов

Also Published As

Publication number Publication date
JPWO2005050674A1 (ja) 2007-12-06
RU2006121975A (ru) 2007-12-27
RU2324246C2 (ru) 2008-05-10
KR20060103509A (ko) 2006-10-02
CN100477019C (zh) 2009-04-08
HK1089549A1 (en) 2006-12-01
NO20062882L (no) 2006-06-20
CA2522049A1 (fr) 2005-06-02
EP1686594A4 (fr) 2010-11-24
US20060264331A1 (en) 2006-11-23
EP1686594A1 (fr) 2006-08-02
US20070184984A2 (en) 2007-08-09
CN1806298A (zh) 2006-07-19

Similar Documents

Publication Publication Date Title
Haldar et al. Processing high critical current density Bi-2223 wires and tapes
EP0832050B1 (fr) Articles multifilamenteux supraconducteurs a base d'oxyde bscco 2223 et methode de leurs fabrication
RU2316837C2 (ru) Способ изготовления сверхпроводящего провода, способ модифицирования оксидного сверхпроводящего провода и оксидный сверхпроводящий провод
JP4038813B2 (ja) 超電導線材の製造方法
EP1868212A1 (fr) Procédé de fabrication de tige métallique supraconductrice
WO2005050674A1 (fr) Materiau de fil supraconducteur, fil supraconducteur multiconducteur mettant en oeuvre celui-ci et procede de production associe
EP0875079A2 (fr) Fils supraconducteurs pour des applications faisant appel a des aimants
US5914297A (en) Precursor composites for oxygen dispersion hardened silver sheathed superconductor composites
JP4011358B2 (ja) 超電導線材の製造方法
JP3051867B2 (ja) 酸化物超電導線材の製造方法
JPH08171822A (ja) 酸化物超電導線材およびその製造方法
JP3848449B2 (ja) 酸化物超電導線の製造方法
JP4016324B2 (ja) 超電導線材の製造方法
JP2005158343A (ja) 超電導線材、それを用いる超電導多芯線およびそれらの製造方法
JP4720211B2 (ja) ビスマス系酸化物超電導線材の製造方法
US20020111277A1 (en) Oxide superconductor composite having smooth filament-matrix interface
AU1650500A (en) Method of producing superconducting tapes
JP2599138B2 (ja) 酸化物系超電導線の製造方法
AU742588B2 (en) Cryogenic deformation of ceramic superconductors
Podtburg Precursor composites for oxygen dispersion hardened silver sheathed superconductor composites
JPH01220308A (ja) 高臨界電流密度と高強度を有する超電導複合ケーブルおよびその製造方法
JPH09115354A (ja) 酸化物超電導複合材及びその製造方法
JPH10134651A (ja) 酸化物超電導複合材
JP2001351444A (ja) 酸化物超電導体及びその製造方法
JP2003331668A (ja) 超電導線材の製造方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2522049

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2006264331

Country of ref document: US

Ref document number: 10553171

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2005515568

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 2004793017

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 20048166800

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 1020067009662

Country of ref document: KR

NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Ref document number: DE

WWE Wipo information: entry into national phase

Ref document number: 2006121975

Country of ref document: RU

WWP Wipo information: published in national office

Ref document number: 2004793017

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1020067009662

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 10553171

Country of ref document: US